Another board I am a mod on has a group set up for newbies. They are restricted to not opening any new threads until they have reached 20 posts. It seems to have weeded out a lot of the "Hi, i'm new here" and "how do I do this?" threads and forces them to search for their own answers. Perhaps this could help?

I'd suspect that here it would lead to a ton of thread revivals with things like "lol" or "tahts a niec gunnn"

Our solution to that was to give the user a warning and lock the thread.